JP3009597U - Cable box made of steel plate for underground burial - Google Patents

Abstract

(57) [Abstract] [Purpose] A cable box unit for underground burial is manufactured using steel plates, and the units are securely connected. [Structure] A connecting projection member 5 is provided on both side walls 1 at a longitudinal connecting end of a steel plate cable box unit 3, and the connecting projection member 5 is fitted to an inner surface of an adjacent steel plate cable box unit 3A. Connect with. [Effect] The connection work is easy, and the joining can be maintained without causing a shift or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable box made of a steel plate for underground embedding used for underground embedding of cables connecting long distances.

[0002]

[Prior art]

 Conventionally, a cable box (box) is mainly installed overhead or on the ground to protect the cable when connecting a cable connecting a long distance. However, burying cables in the ground has attracted attention from the viewpoints of landscape and effective use of underground space by installing cable boxes on the ground or above ground. Recently, two-way communication such as telephone, broadcasting, and data communication using large-capacity optical fiber networks has been attracting attention, and embedding underground cables such as optical fiber cables is becoming an issue.

By the way, a concrete cable box is generally used as a common groove for burying cables in the ground. For example, in JP-A-52-131636, a wiring shelf is provided on the inner wall. It has been proposed to form a rectangular groove, which is required to be installed in multiple stages and which can be attached, by combining and assembling planographic precast concrete slabs that are divided and configured.

[0004]

[Problems to be solved by the device]

 However, even if the concrete cable box is formed by assembling a precast concrete slab or not precast, the following problems occur. (1) Even though it is a precast concrete slab with a split structure that is assembled in the field, it is difficult to carry because of its heavy weight and thickness due to its material, transportation, storage and excavation width of the buried site.

(2) In the case where cement is poured into a mold for integral molding without using a precast plate, the degree of freedom in shape is low. It is inconvenient because it is difficult to process new cable outlets afterwards, and there are few functions that can be changed. (3) Concrete is weak against tensile load and impact. In order to solve the above-mentioned problems of the concrete cable box, the present invention uses a steel plate that is resistant to tensile loads and impacts to reduce the thickness and weight, and facilitates the processing such as cutting and welding. It is intended to provide a steel-made cable box for underground burying, which can take advantage of the characteristics of

[0006]

[Means for Solving the Problems]

 The invention according to claim 1 is a steel plate cable box for underground embedding, which is formed by connecting a steel plate cable box unit including a side wall and a bottom wall with a lid on the top. At the connecting end of the box unit in the longitudinal direction, connecting projection members are provided on the side wall or both side walls and the bottom wall in the longitudinal direction, and the connecting projection member is connected to the adjacent steel plate cable box unit. A steel-made cable box for underground embedding, which is characterized in that it is configured to be fitted into an inner surface of a longitudinal connecting end portion for connection.

According to a second aspect of the present invention, at the connecting end portion in the longitudinal direction of the cable box unit made of a steel plate, connecting projection members are provided on both side walls or both side walls and the bottom wall in the longitudinal direction. The connecting projection member is configured to be fitted in a recessed groove facing in the longitudinal direction provided on the inner surface side of the longitudinal connecting end of the adjacent steel plate cable box unit for connection. It is a cable box made of a steel plate for underground burying described.

According to a third aspect of the present invention, a connecting projection member is provided on both side walls or both side walls and a bottom wall of the connecting end portion in the longitudinal direction of the steel plate cable box unit, and the connecting projection is provided. The steel plate cable for underground embedding according to claim 1, wherein the member is configured to be fitted into a concave groove provided inwardly on the inner surface side of the longitudinal connecting end of the adjacent steel plate cable box unit. It is a box.

[0009]

[Action]

 In the present invention, since the longitudinal connecting end of the steel cable box unit and the longitudinal connecting end of the adjacent steel cable box unit are connected by the above configuration, it is easy to use heavy equipment such as a mobile crane. Can be connected to. In addition, since the connecting parts can be tightly connected, it is possible to prevent water from seeping from the connecting parts, thus eliminating the need for new fastening work of the connecting parts.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a steel plate cable box unit 3 having a front surface, a rear surface, and a top surface, which are formed of side walls 1 and bottom walls 2 on both sides and has a rectangular cross section, is basically covered with a steel plate lid 4. There is. As for steel plates, small ones are hot-rolled thin plates according to the unit size, and large ones are hot-rolled thick plates.They are mainly manufactured by bending. If necessary, ribs can be attached to the inner and outer surfaces of the box unit and the lid by welding in order to further improve the strength.

According to the present invention, the steel plate cable box unit 3 can be easily and reliably connected to the adjacent steel plate cable box unit 3A and the adjacent steel plate cable box unit 3A. A connecting projection member 5 is provided in a stepped shape in the longitudinal direction only at one longitudinal end of the side walls 1 on both sides of the structure. The outer width of the pair of connecting projection members 5 is slightly smaller than the inner width of the side wall 1 on both sides.

When connecting the steel plate cable box unit 3 to the adjacent steel plate cable box unit 3 A, the steel plate cable box unit 3 is moved in the direction of the arrow, and a pair of end plates of the side wall 1 are provided. The connection projection member 5 can be easily connected by fitting it between the side wall 1A of the adjacent steel plate cable box unit 3A. In addition, 2A and 5A respectively show the bottom wall and the connecting projection member of the adjacent steel plate cable box unit.

FIG. 5 and FIG. 6 show a state in which a steel plate cable box unit 3 is connected and buried in a groove excavated in a road via a connecting protruding member 5. When the steel plate cable box unit 3 is embedded to form the steel plate cable line, first, the cable 10 is taken into the cable box unit 3 and extended, and then the steel plate lid 4 is attached. Next, the asphalt (concrete) 7 is laid on the steel plate lid 4 to complete the burying work.

FIG. 2 is a plan view of the present invention in which the connecting protrusions 5 are provided on the side walls 1 on both sides of the steel plate cable box unit 3 shown in FIG. 1, and the bottom wall 2 is also provided with the connecting protrusions 5. 7 shows another embodiment of the present invention. In order to connect the steel plate cable box unit 3 to the adjacent steel plate cable box unit 3A, the steel plate cable box unit 3 is moved in the direction of the arrow to project integrally from the side wall surface 1 and the bottom surface wall 2. The member 5 can be easily and surely connected by fitting it into the other end of the adjacent steel cable box unit 3A.

FIG. 3 shows a concave shape in which the L-shaped member 6 is fixed by welding along the inner surfaces of the side wall 1A and the bottom wall 2A on both sides at one end of the adjacent steel plate cable box units 3A. The groove 7 is formed. Then, the steel plate cable box unit 3 is moved in the direction of the arrow and the connecting projection member 5 is fitted into the concave groove 7 for connection.

In FIG. 3, the case where the connecting projection member 5 is provided also on the bottom wall 2 of the steel plate cable box unit 3 and the concave groove 7 is also provided on the bottom wall 2A of the adjacent steel plate cable unit 3A has been described. However, it is also possible to connect them by not providing them on the bottom walls 2 and 2A but by providing the connecting projection member 5 and the concave groove 7 only on the side walls 1 and 1A on both sides.

Further, in FIG. 4, an outward connecting projection member 5 is formed at one end of the steel plate cable box unit 3, while an inward concave groove 7A is formed at the end of the adjacent steel plate cable unit 3A. 2 shows an embodiment in which Here, the connecting projection member 5 can be formed by attaching the outward groove member 8 to the end portion of the steel plate cable box unit 3 by welding. Further, the concave groove 7A can be formed by attaching an inward groove member 9 to the end portion of the adjacent steel plate cable box unit 3A by welding.

In order to connect the steel plate cable box units 3 to the adjacent steel plate cable box units 3, the connecting projection member 5 is lowered from above as shown by the arrow, and is inserted into the concave groove 7A provided inward. Can be connected by fitting. Note that the connection portion of the bottom wall 2 can be omitted, as in the above case. Which of the embodiments described with reference to FIGS. 1 to 4 is selected may be determined depending on conditions such as whether the buried ground is strong or soft, and whether waterproofing is required. If complete prevention is required, it may be difficult to fit the product only by fitting. In places where there is a lot of spring water, it is preferable to use a sealing material such as putty on the connection part of the steel plate cable box unit for waterproofing.

In order to form the connecting projection member or the concave groove at the end of the steel plate cable box unit, the processed member may be welded or may be integrally formed with the main body by press working. The inner and outer surfaces of the steel plate cable box unit 3 are (1) galvanized, if necessary, (2) sandblasted + base treated + heavy anticorrosion or (3) galvanized + base treated + heavy anticorrosive. Is preferred.

In addition, in the embodiment according to FIGS. 1 to 4, the case in which the connection structure of the front end portion and the rear end portion of the steel plate cable box unit is different has been described, but the front end of the same box unit is described. It goes without saying that it is also possible to arrange parts with the same connection structure at the rear part and the rear end part, and to connect by using different connection structure for adjacent box units. .

[0021]

As described above, according to the present invention, the longitudinal connecting ends of the steel plate cable box unit are provided with the connecting projection members on both side walls or both side walls and the bottom wall, and the connecting projections are provided. The member is fitted into the inner surface of the end of the adjacent steel plate cable box unit in the longitudinal direction or into the concave groove, so not only the connection work is easy, but also a strong connection state can be maintained without deviation etc. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective view showing a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing an implementation state according to the present invention (A in FIG. 6).
-A arrow).

FIG. 6 is a side view showing an implementation state according to the present invention.

[Explanation of symbols]

 1 Side wall 2 Bottom wall 3 Steel plate cable box unit 4 Steel plate lid 5 Connecting projection member 6 L-shaped member 7 Recessed groove 8 Outward groove member 9 Inward groove member 10 Cable

Claims (3)

[Scope of utility model registration request] 1. A steel-made cable box for underground embedding, which is formed by covering a top part and connecting a steel-made cable box unit composed of both side walls and a bottom wall, the longitudinal direction of the steel plate cable box unit. The direction connecting end portion is provided with connecting projecting members on both side walls or both side walls and the bottom wall in the longitudinal direction, and the connecting projecting members are provided in the longitudinal connecting end portions of the adjacent steel plate cable box units. A cable box made of a steel plate for underground burying, which is configured to be fitted and connected to the inner surface. 2. A connecting projection member is provided on both side walls or both side walls and a bottom wall of the steel plate cable box unit in the longitudinal direction in the longitudinal direction, and the connecting projection members are adjacent to each other. The steel plate cable for underground embedding according to claim 1, wherein the cable box unit is made of a steel plate, and is configured to be fitted in a longitudinal groove provided on the inner surface side of the connection end portion in the longitudinal direction of the steel plate cable box unit for connection. Box 3. A connecting projection member is provided on both side walls or both side walls and a bottom wall of the connecting end portion in the longitudinal direction of the steel plate cable box unit, and the connecting projection member is provided.
The steel-made cable box for underground burying according to claim 1, wherein the cable box unit for underground burying is constructed so as to be fitted in a concave groove provided inwardly on the inner surface side of the longitudinal connecting end of the adjacent steel-board cable box unit.